[17.0][FIX] sale_fixed_discount: SOL discount propagation to invoice line #3150
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Context:
when creating or editing a sale order line by using the UI, the
_onchange_discount_fixed()
ensures that thediscount
field is computed based on the value ofdiscount_fixed
andprice_unit
fields. Keeping thediscount
updated is important because this value will be propagated to the invoice line at the moment the invoice is generated.Description of the issue:
The onchange method is not triggered in case we create or modify the sale order line by using an API (and so without using the UI) or when we update
discount_fixed
andprice_unit
field in custom code.This means that the wrong
discount
value (that stays0.0
) will be propagated to the invoice line at the moment the invoice is generated.Proposed fix:
with this PR the onchange method is replaced by extending the
_compute_discount()
method, ensuring that thediscount
field is consistent withdiscount_fixed